Improvement in mortising-machines



J. BERRY.

Mnrtising-Ma'chine.

N0.165,294 Paitentedluly6,1875.

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ILPETERS, PHOTD-UTHOGRAPH WASHINGYON D 0 prehended, reference is wheel G which four points or quarters NITEZD fs'rarns JOHN BERRY, or SAN'FRANOISCO, CALIFORNIA.

Pa'raNrOr IMPROVEMENT IN mohrlsmc-macumsa Specification forming part of Letters Patent No. 165,294, dated July 6, 1875; application filed January 4, 1875.

' To all whom it may concern:

I the mortise be smoothly and quickly cut.

To explain my invention, so that its construction and operationcan be readily comhad to the accompanying drawings and to the letters marked thereon, forming a part of this specification, in WhlOl1- Figure l is a front elevation, partly broken; Fig. 2, a side elevation, also partly broken; Fig. 3, side view of the saw-teeth; Fig. 4, a rear-edge view of the saw-teeth or chain.

A represents the rectangular frame of my mortising-machine. B is the table, upon'which the timber to be mortised is placed. This table is attached to a flat vertical bar, 0, supported by a curved brace, 0, through both of which, and a vertical slotted brace, D, immediately in the rear of the bar 0, a pin, E, passes, having a projecting head,'which is engaged bya cam, F, upon the outer face of the wheel G, where teeth operate the lanternupon the driving-pulley shaft H, and by'which means an alternate rectilinear motion is imparted to the table. The upper driving-shaft I has its bearings at the top of the frame, and the upper end of it projects to the front; Upon the end of the shaft I fix a metal disk, J, the edges of which are flattened or clipped at four points, and from extend lugs'or teeth a a. Below the disk J, and attached to the frame of the machine, is a flat metal plate, K, formed by joining two flat plates, whose juncture is prevented centrally by the flangeplates bi), which form ways for the endless chain-saw, to be described hereinafter. This plate K is attached to the frame by the bolts 0 c, and extends down vertically to near the mortise in the table B when it is elevated. Both ends of the plate are open at the upper end, to admit the working and passage of the teeth a a of the disk J, and at the lower end for the admission of a disk-plate, L, around which the endless chain passes.

, The diskL is an important feature of my invention, as by the use of it the machine can 1 but in the use of my device of a rotating disk in the end of the plate without a center axis or-bearing this defect is entirely remedied, and the machine can be run hours in succession, and without stoppage, as the disk has but few bearing-points, and does not rotate with that velocity proportionate with the travel of the endless chain-saw.

The endless chainsaw is formed by two sets of teeth, d e. Those represented at d are double. The chain is formed by reuniting the two ends of the single teeth 6 between the ends of the double teeth, by which a slot, f, is formed in each series of the double teeth, the single teeth beingset forward a little from the vertical line of the back of the chain, so that a groove, f, is provided, which. receives the guides or flanges b b of the metal plate, and the edge of the disk L, while the lugs or teeth a a of the disk at the end of the shaft J enter deeper into the slot f, and carry the endless chain of teeth around to accomplish the desired object of cutting the mortise, the single teeth 6 acting as pioneer cutters for the double teeth d.

I am aware of the Letters Patent N 0. 140,257

and hereby disclaim the same.

Having thus described my invention,- what I claim as new, and desire to secure by Let ters Patent, is-- I 1. The endless chain-saw, consisting of the single and double teeth at 6, so united that a groove, f, and slots f are formed along its insavv having double and single teeth 01 0, slot ner edge, to receive the guide plates or Ways f, and groove f, with the actuating-disk J b b and teeth a a upon the plate J, and the, and guiding disk or plate L, when constructed periphery or edge of the disk L, as set forth substantially in the manner as herein set forth and specified. and specified.

2. The loosely-fitted guiding-disk L, in 00111- In witness whereof I have hereunto set my bination with the plate K and endless chainhand and seal.

saw, all the parts being constructed andoper- JOHN BERRY. [L. 8.] ating substantially as herein set forth and Witnesses: specified. U. W. M. SMITH,

3. The combination 'of the endless cl1'ain- PHILIP MAHLER. 

